How do you create a dashed circle in blender?
The answer is pretty simple and in the link which you provided. Add a circle object, go to the bottom left, click on the triangle thingy, and set fill type from nothing to N-Gon, or if you prefer nothing, I don't mind, that is your choice. Then rotate the circle 90 degrees. Then, add an array modifier and set the values to this:

You can change the count to how much you like depending on the number of dots you want. I just set it to 15.
Here's the rendered result:

Hope it helps.